Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 538313
Title Symbiotic polydnavirus and venom reveal parasitoid to its hyperparasitoids
Author(s) Zhu, Feng; Cusumano, Antonino; Bloem, Janneke; Weldegergis, Berhane T.; Villela, Alexandre; Fatouros, Nina E.; Loon, Joop J.A. van; Dicke, Marcel; Harvey, Jeffrey A.; Vogel, Heiko; Poelman, Erik H.
Source Proceedings of the National Academy of Sciences of the United States of America 115 (2018)20. - ISSN 0027-8424 - p. 5205 - 5210.
DOI https://doi.org/10.1073/pnas.1717904115
Department(s) Laboratory of Entomology
EPS
Biosystematics
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Herbivore - Herbivore-induced plant volatiles - Interaction network - Multitrophic interactions - Parasitic wasp - Plant-mediated - Saliva
Abstract

Symbiotic relationships may provide organisms with key innovations that aid in the establishment of new niches. For example, during oviposition, some species of parasitoid wasps, whose larvae develop inside the bodies of other insects, inject polydnaviruses into their hosts. These symbiotic viruses disrupt host immune responses, allowing the parasitoid’s progeny to survive. Here we show that symbiotic polydnaviruses also have a downside to the parasitoid’s progeny by initiating a multitrophic chain of interactions that reveals the parasitoid larvae to their enemies. These enemies are hyperparasitoids that use the parasitoid progeny as host for their own offspring. We found that the virus and venom injected by the parasitoid during oviposition, but not the parasitoid progeny itself, affected hyperparasitoid attraction toward plant volatiles induced by feeding of parasitized caterpillars. We identified activity of virus-related genes in the caterpillar salivary gland. Moreover, the virus affected the activity of elicitors of salivary origin that induce plant responses to caterpillar feeding. The changes in caterpillar saliva were critical in inducing plant volatiles that are used by hyperparasitoids to locate parasitized caterpillars. Our results show that symbiotic organisms may be key drivers of multitrophic ecological interactions. We anticipate that this phenomenon is widespread in nature, because of the abundance of symbiotic microorganisms across trophic levels in ecological communities. Their role should be more prominently integrated in community ecology to understand organization of natural and managed ecosystems, as well as adaptations of individual organisms that are part of these communities.

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